验证occ和vtk整合工作的demo

在编译occ通过过后，我需要验证occ是否能够正常结合vtk进行开发工作

使用CMake进行环境变量设置：

CMakeList.txt

PROJECT (IGESReader)#VTK Part:
FIND_PACKAGE(VTK)
IF (VTK_FOUND)INCLUDE(${VTK_USE_FILE})
ELSE(VTK_FOUND)MESSAGE(FATAL_ERROR"Cannot build without VTK.  Please set VTK_DIR.")
ENDIF (VTK_FOUND)#OpenCascade Part:
INCLUDE_DIRECTORIES(C:\OpenCASCADE6.5.1\ros\inc
)LINK_LIBRARIES(vtkCommonvtkGraphicsvtkRenderingvtkIOC:\OpenCASCADE6.5.1\ros\win32\vc8\libd\TKIGES.libC:\OpenCASCADE6.5.1\ros\win32\vc8\libd\TKernel.libC:\OpenCASCADE6.5.1\ros\win32\vc8\libd\TKBRep.libC:\OpenCASCADE6.5.1\ros\win32\vc8\libd\TKMath.libC:\OpenCASCADE6.5.1\ros\win32\vc8\libd\TKGeomBase.libC:\OpenCASCADE6.5.1\ros\win32\vc8\libd\TKGeomAlgo.libC:\OpenCASCADE6.5.1\ros\win32\vc8\libd\TKG3d.libC:\OpenCASCADE6.5.1\ros\win32\vc8\libd\TKG2d.libC:\OpenCASCADE6.5.1\ros\win32\vc8\libd\TKTopAlgo.libC:\OpenCASCADE6.5.1\ros\win32\vc8\libd\TKXSBase.libC:\OpenCASCADE6.5.1\ros\win32\vc8\libd\TKMesh.lib
)ADD_EXECUTABLE(IGESReader example.cxx)

添加一个example.cxx

// sampleExample.cpp : Defines the entry point for the console application.
//
// OpenCascade library.
#include <gp_Circ.hxx>
#include <gp_Elips.hxx>
#include <gp_Sphere.hxx>#include <Poly_Polygon3D.hxx>
#include <Poly_Triangulation.hxx>#include <TopoDS_Edge.hxx>
#include <TopoDS_Face.hxx>#include <BRep_Tool.hxx>
#include <BRepMesh.hxx>
#include <BRepBuilderAPI_MakeEdge.hxx>
#include <BRepBuilderAPI_MakeFace.hxx>//vtk lib
#include <vtkSmartPointer.h>
#include <vtkPoints.h>
#include <vtkPolyData.h>
#include <vtkCellArray.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkProperty.h>
#include <vtkTriangle.h>/*
* @breif Descret the shape: face.
*        For Face will be discreted to triangles; (BRepMesh_FastDiscret)
*        To get the triangles of the face, use BRep_Tool::Triangulation(Face, L);
*/
void BuildMesh(vtkRenderer* render, const TopoDS_Face& face, double deflection = 0.1)
{TopLoc_Location location;BRepMesh::Mesh(face, deflection);Handle_Poly_Triangulation triFace = BRep_Tool::Triangulation(face, location);Standard_Integer nTriangles = triFace->NbTriangles();gp_Pnt vertex1;gp_Pnt vertex2;gp_Pnt vertex3;Standard_Integer nVertexIndex1 = 0;Standard_Integer nVertexIndex2 = 0;Standard_Integer nVertexIndex3 = 0;TColgp_Array1OfPnt nodes(1, triFace->NbNodes());Poly_Array1OfTriangle triangles(1, triFace->NbTriangles());nodes = triFace->Nodes();triangles = triFace->Triangles();       vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();vtkSmartPointer<vtkCellArray> cells = vtkSmartPointer<vtkCellArray>::New();vtkSmartPointer<vtkPolyData> polyData = vtkSmartPointer<vtkPolyData>::New();points->Allocate(nTriangles * 3);cells->Allocate(nTriangles);int id = 0;for (Standard_Integer i = 1; i <= nTriangles; i++){Poly_Triangle aTriangle = triangles.Value(i);aTriangle.Get(nVertexIndex1, nVertexIndex2, nVertexIndex3);vertex1 = nodes.Value(nVertexIndex1).Transformed(location.Transformation());vertex2 = nodes.Value(nVertexIndex2).Transformed(location.Transformation());vertex3 = nodes.Value(nVertexIndex3).Transformed(location.Transformation());points->InsertNextPoint(vertex1.X(), vertex1.Y(), vertex1.Z());points->InsertNextPoint(vertex2.X(), vertex2.Y(), vertex2.Z());points->InsertNextPoint(vertex3.X(), vertex3.Y(), vertex3.Z());vtkSmartPointer<vtkTriangle> triangle = vtkSmartPointer<vtkTriangle>::New();triangle->GetPointIds()->SetId(0,id * 3);triangle->GetPointIds()->SetId(1,id * 3 + 1);triangle->GetPointIds()->SetId(2,id *3 + 2);// Add the triangle to a cell arraycells->InsertNextCell(triangle);id++;}polyData->SetPoints(points);polyData->SetPolys(cells);vtkSmartPointer<vtkPolyDataMapper> sourceMapper = vtkSmartPointer<vtkPolyDataMapper>::New();sourceMapper->SetInput(polyData);vtkSmartPointer<vtkActor> sourceActor = vtkSmartPointer<vtkActor>::New();sourceActor->SetMapper(sourceMapper);sourceActor->GetProperty()->SetColor(1,0,0);render->AddActor(sourceActor);}void BuildScene(vtkRenderer* render)
{gp_Ax2 axis;// 1. Test sphere face while deflection is default 0.1.axis.SetLocation(gp_Pnt(26.0, 0.0, 0.0));TopoDS_Face sphereFace1 = BRepBuilderAPI_MakeFace(gp_Sphere(axis, 8.0));BuildMesh(render, sphereFace1);// 2. Test sphere face while deflection is 2.0.axis.SetLocation(gp_Pnt(26.0, 18.0, 0.0));TopoDS_Face sphereFace2 = BRepBuilderAPI_MakeFace(gp_Sphere(axis, 8.0));BuildMesh(render,sphereFace2, 2.0);// 3. Test sphere face while deflection is 0.001.axis.SetLocation(gp_Pnt(26.0, -18.0, 0.0));TopoDS_Face sphereFace3 = BRepBuilderAPI_MakeFace(gp_Sphere(axis, 8.0));BuildMesh(render, sphereFace3, 0.001);
}int main(int argc, char *argv[])
{// Create a renderer, render window, and interactorvtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New();renderWindow->AddRenderer(renderer);vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New();renderWindowInteractor->SetRenderWindow(renderWindow);//build meshBuildScene(renderer);renderer->SetBackground(1,1,1);// Render and interactrenderWindow->Render();renderWindowInteractor->Start();return 0;
}

你可能在编译的过程当中，遇到缺少dll文件，这个说明 你并没有把相应的dll文件放在环境变量当中去。

运行结果：